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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
With increase in load, convection superheater has

Rising characteristic
Flat characteristic
Linear characteristic
Drooping characteristic

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

Chimney
Steam jet
Centrifugal fan
None of these

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Superheater
Economizer
Air-preheater
Injector

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

Increases the work-done through the turbine
Increases the efficiency of the turbine
Reduces wear on the blades
All of these

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Babcock and Wilcox boiler
Lancashire boiler
Benson boiler
Locomotive boiler

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Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

176.5H/T1
T1 /176.5H
T1 /88.25H
88.25H/T1

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